TEKTON 1366 10-Pc. 3/8"-Drive Hex Bit Socket Set (Metric) features: Drop Forged, Heat Treated, and Chrome Plated Carbon Steel Sockets, Sandblasted, Chrome-Vanadium, Steel Bits Precision-Machined Bits, Notches in Sockets Lock onto Ratchets or Extensions, 7-pc. Hex Bit Sockets (Metric): 3, 4, 5-5.5, 6, 8, 10mm, 2-pc. Driver Bit Sockets: No. 2 Phillips Bit and 1/4" Flat Bit, 1-pc. 9-Clip Socket Holder